Will cosmetics go bad when heated?

Yes, cosmetics should not be stored in places where the temperature is too high. Because high temperature will cause oil-water separation of cosmetics, the paste will dry and shrink, resulting in deterioration.

In addition, when preserving cosmetics, you should also pay attention to:

1, sun protection: cosmetics should not be stored in direct sunlight or in places with sufficient light. Because light will make the water in cosmetics evaporate, some ingredients lose their vitality and lead to deterioration. Ultraviolet rays in the sun will also make some substances in cosmetics undergo chemical changes, which will affect the use effect and even produce adverse reactions.

2, antifreeze: cosmetics can be placed in the fresh-keeping freezer of the refrigerator, not in the freezer. In cold season, it is not advisable to put cosmetics outdoors or carry them outdoors for a long time. Because freezing will make cosmetics freeze.

Phenomenon, and after thawing, oil-water separation will occur, the texture will become thicker, which will irritate the skin.

3, moistureproof: Some cosmetics contain protein, which is easy to get moldy after being damp. Some cosmetics use iron covers, which are easy to rust and corrode after being wet, and make cosmetics deteriorate.

4. Long-term protection: the validity period of general cosmetics is 1-2 years, and the storage period after opening is shorter. Therefore, it is best to use up cosmetics within the validity period, and it is not allowed to stop using them after expiration. Even the best cosmetics, if carefully kept, will be worthless.

5, antifouling: cosmetics must be tightened in time after use to avoid bacterial invasion and reproduction. It is best to avoid holding it directly by hand when using it, and you can use clean cotton swabs and other tools to hold it. If you take too much at a time, you can apply it to other parts of your body and don't put it back in the bottle.